Achene Anatomy Diagram - Tubercle, Perianth, and Bristles Labeled #182060 (License: Personal Use)

This black-and-white botanical illustration depicts a mature achene-specifically from a grass or sedge family-with precise labels indicating the tubercle (a small projection), the achene itself (a dry, one-seeded fruit), the perianth (remnant floral envelope), and the surrounding bristles (modified sepals or glumes). The right-side view shows the achene detached, highlighting its textured surface and appendages critical for dispersal and identification.

Used in educational materials, field guides, and taxonomic keys for plant identification; supports learning about fruit morphology in angiosperms, especially Poaceae or Cyperaceae.